* {
    margin: 0;
    padding: 0;
}

ul {
    list-style: none;
}

a {
    text-decoration: none;
    color: white;
}

a:hover {
    background-color: red;
}

.wrad {
    margin: 0 auto;
    width: 220px;
    /* height: 500px; */
    text-align: center;
    border: 1px solid #ccc;
    background-color: gray;
    color: white;
}

.menu .ilist {
    /* 隐藏菜单 */
    display: none;
}

.menu h3 {
    display: inline-block;
    width: 100%;
    height: 20px;
    line-height: 20px;
    padding-top: 15px;
    padding-bottom: 15px;
    background-color: blue;
}

h3:hover {
    background-color: skyblue;
}

.ilist li {
    display: inline-block;
    width: 100%;
    height: 40px;
    line-height: 40px;
    border: 1px solid black;
    list-style: none;
}